Sharif University of Technology Scientia Iranica 1026-3098 21 6 2014 12 01 High intensity enhancement of unidirectional propagation of a surface plasmon polariton beam in a metallic slit-groove nanostructure High intensity enhancement of unidirectional propagation of a surface plasmon polariton beam in a metallic slit-groove nanostructure 2508 2512 3642 EN B. Eftekharinia Department of physics, Tarbiat Modares University, Tehran, P.O Box 14115-175, Iran S. H. Nabavi Department of physics, Tarbiat Modares University, Tehran, P.O Box 14115-175 A. Moshaii Department of physics, Tarbiat Modares University, Tehran, P.O Box 14115-175, Iran A. Dabirian Department of physics, Sharif University of Technology, Tehran, P.O Box 14588-89694, Iran Journal Article 2015 01 07 We propose an innovative design for metallic slit-groove nanostructure to increase the propagation intensity of a unidirectional surface plasmon polariton (SPP) light beam. Our idea is based on the combination of the concept of unidirectional plasmonic wave propagation in a metallic slit-groove nanostructure and the well- known hybrid modes of a hybrid metal-dielectric waveguide. Our results demonstrate that the hybrid structure results in up to 5 times enhancement in the SPP beam intensity relative to the conventional design of slit-groove nanostructure. This new design of SPP based nano source can be applied in many applications including nano photonic devices.  https://scientiairanica.sharif.edu/article_3642_300d1539c3b6aa1793b5678b857732cf.pdf